Cleaning device for marine-boiler furnaces.



J. K. BRUFF.

CLEANING DEVICE FOR MARINE BOILER FURNACES.

APPLICATION FILED NOV. IO. I915- Patented Aug. 1, 1916.

3141mm! J K. BR u FF a ttOtHYA JOHN K. BRUFF, OF BALTIMORE, MARYLAND.

CLEANING DEVICE FOR MARINE-BOILER FURNACES.

Specification of Letters Patent.

Patented Aug. 1, 1916.

Application filed. November 10, 1915. Serial No. 60,765.

To all whom it may concern:

Be it known that 1, JOHN K. BRUFF, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Cleaning Devices for Marine- Boiler Furnaces, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to an improved cleaning device for marine boiler furnaces and has for its primary object to provide a simple and easily operated tool for removing the scale which accumulates upon the furnace Wall of a marine boiler.

It is another and more particular object of the invention to provide a device of the above character embodying two substantially semi-circular resilient metal bars, means for detachably securing a plurality of scraping blades to each of said bars, and means for connecting the ends of the bars together to hold the same in operative relation to the furnace wall.

It is an additional object of the invention to provide a device for the above purpose which may be easily and quickly manipulated so that the scale can be thoroughly removed from the furnace wall in a mini mum length of time, said device being exceedingly durable in its construction and capable of. manufacture at relatively small cost.

With the above and other objects in view, my invention consists in the novel features of construction, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which,

Figure 1 is an elevation showing the two sections of the scraping tool connected together and arranged in operative position with respect to the furnace. Fig. 2 is a detail perspective view of one section of the tool; and Fig. 3 is an enlarged perspective view of one of the scraper blades;

Referring in detail to the drawing, 5 indicates the two semi-circular resilient metal bars, the extremities of which are angularly bent and outwardly extended, as at 7, and provided with openings to receive the connecting bolts 8. Suitable nuts 9 are adapted to be threaded upon these bolts, whereby the resilient metal bars 5 may be connected together at their extremities.

To the inner face of each of the bars 5,

spaced pairs of transversely disposed angle plates 10 are securely riveted or otherwise fixed. The free flanges of these angle plates are disposed in opposed spaced relation and project inwardly from the bar 5, said flanges being provided with spaced coinciding openings. Between the opposed flanges of each pair of angle plates, the edge of a scraping blade 11 is adapted to be engaged, and this blade is also provided with spaced openings 12 to register with the openings in the flanges of the plates 10. The fastening bolts 13 are then inserted through these openings and nuts 14 threaded upon the ends of the bolts to securely clamp the flanges of the angle plates against opposite sides of the scraper blade and rigidly hold the latter in position.

To each of the semi-circular resilient bars 5, spaced hand holds 15 are suitably secured.

In the use of the device, the two bars 5 are arranged in embracing relation to the wall of the boiler furnace,-as indicated in Fig. 1, with the inner longitudinal edges of the blades 11 in contact with the periphery of the furnace wall. The extremities of'the two bars 5 are then securely bolted together, as above explained. The operator now grasps the pairs of hand holds 15 on the bars 5 alternately and turns said bars around the furnace and longitudinally along the same as the scraping action progresses. In this manner, it will be understood that the series of blades 11 will quickly and thoroughly remove all scale from the wall of the furnace.

From the foregoing description, taken in connection with the accompanying drawing, the construction, manner of use and several advantages of the invention will be clearly and fully understood. It is, of course, ap parent that any desired number of the scraping blades may be arranged upon each of the bars 5 and said bars can be constructed in various diameters for application to boiler furnaces of different sizes. The scraping blades 11 may also be made of greater or less length, as desired. The device is further susceptible of various modifications in the form, proportion and arrangement of the several elements employed and it will, therefore, be understood that I reserve the privilege of adopting all such legitimate changes as may be fairly embodied within the spirit and scope of the invention as claimed Having thus fully described my invention, What I desire to claim and secure by Letters Patent is 1. A device of the character described comprising a pair of metal bars adapted to be arranged in embracing relation upon a boiler furnace and detachably connected together at their extremities, equidistantly spaced scraping blades of a length greater than the width of said bars adapted to eX- tend longitudinally of the furnace wall, means for detachably securing the blades upon the inner faces of said bars and operating means fixed to each of said bars.

2. A device of the character described including a pair of metal bars adapted to be arranged in embracing relation upon a boiler furnace, said bars having their extreinities outwardly extended and provided with openings, connecting bolts adapted for engagement through said openings, spaced pairs of angle plates fixed upon the inner face of each of the bars and having free inwardly extending flanges, said plates being of greater length than the Width of said bars, scraper blades adapted to be arranged between the inwardly extending flanges of the angle plates, a series of bolts to detachably connect the blades to said flanges, and operating means fixed upon each of said bars.

In testimony whereof I hereunto afiix my signature in the presence of two Witnesses.

JOHN K. BRUFF.

Witnesses ISAAC D. VVIIEATON, MARY E. VVHEATON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

